Roof support for mines



Nov. 3l 1925- 1,559,560

W. H. DOUGHTY ROOF SUPPORT FOR MINES Filed Feb. 11. 1924 Patented Nev. 3, 1925.

UNITED- STATES WALTER. n. vnouent'rr, or nARrINs FERRY, omo.

ROOF SUPPORT FOR MINES.

Application ined February 11, 1924. Serial No. 691,868.

To all whom zt may concern.'

a citizen of the United States of America, and resident of Martins Ferry, county of vBelmont and State of Ohio, have invented certain new and useful Improvements in Roof Supports for Mines, of which the following is a specication.

This invention relates to supports for the roofs of mines, and more. s cically to a roof header and supports t erefor.

The primar object of the invention is to provide a hea er-like support for mine roofs having simple and ractical means by which l5 it is sus ended in its place rather than superpose upon props in the manner usual to the timber headers commonly employed in mines.

A further obect is to provide a vmetallic header of the c aracter mentioned which is adapted to be supported either by means of suspension rods or by means of props.

In describing the invention in detail, reference is herein had to the accompanying drawings, in which- Figure 1 is a cross section of amine entryway, illustrating the application of my invention;

Figure `2 is an enlarged section on line 2-2, Fig. 1, showing the form of the header-suspension device; and- Figure 3 is a view, similar to Fig. 1, of a room or passage of greater width, illustrating the header supported by props.

Referring to said drawings, 1 indicates a mine passage or tunnel which may be in theform of an entryway, corridor, or narrow room. Disposed in closely underlying relation to the roof 2 of said tunnel is a. roofsupporting header 3 consisting of a metalv ythe supporting props usually employed.

bar, herein shown as of flat rectangular form, which extends approximately from one side wall of the tunnel to .the other. The

opposite ends of said yheader are turned downwardly and inwardly, forming inclined hook-like terminals 4, each of which is adapted to be en aged with the transverse end member 5 o? a substantially U-shaped rod 5 which serves as an anchoring device by means of which the adjacent end of the Be it known that I, WALTER H. DoUen'rY,

header bar is supported. Said anchor rod .5 has its parallel members 5b disposed with- 1n bores 6 provided therefor in the overlyin rock strata, said bores being outwardly an upwardly inclined from the angle between the roof 2 and the adjacent side wall 7 of the tunnel, asv shown. Saidparallel anchor members 5* have their ends turned laterally outward forming anchor lugs 5 which are adapted to interlock with fillers 8 of concrete 60 o'r other suitable material tamped in said bores 6 following introduction therein of said anchor members.

In some eases it is practicable and preferable to employ props, as 9, Fig. 3as supvmi ports for the header bars 3, as when the passage or tunnel spanned is of such great width that such props do not unduly restrict the width of the tunnel "or interfere with the work. Such props are slightly inclined in an upward and outward direction and have their up er ends disposed in seated underlying relation to the header bar and abutting the inner faces of the header terminals 4, as shown.

It will be noted that no amount of sagging of the intermediate portion of the headerbar 3 which may result from weight imposed yupon said bar can result in disengagement of the terminals 4 from their supports, 80 whether such supports consist of the anchoring rods 3 or the props 9.

The employment of the structurewhich embodies the anchoring rods 3 is particularly advantageous in narrow corridors not only in that greater space is afforded for the passage of mine cars but also thatysuch supports are not subject to displacement through derailing ofcars and the like, as are .0 What is claimed is 1. A roof support for mines comprising a metal bar for closel underlyingthe roof, said bar having ownwardly extending hook-like end terminals, land an anchor-like 95 suspension rod adapted to be engaged with said terminals and embedded in dla onally extending directions in the mine w s. i

42. A roof, support for mines compri-'sling n metal bar for closely underlying the ro0f,'

' rod for each end of said bar, said rod being of U-shape and adapted to have the transverse member thereof interengaged with the adjacent bar terminal and to have the parallel members thereof received in upwardly and outwardly inclined bores in the mine-10 walls, said parallel members havin laterally directed anchor lugs formed on t eir ends for interlocking with e filler tamped in said bores.

In testimony whereof, I ax my signnu ture.

'WALTER H. DOUGHTY. 'l 

